From hidden bunks above the cabin to strict safety protocols and quirky passenger nicknames, the life of flight crews is a world most travelers never see. These behind-the-scenes details show the ...

Estimate your cosmic radiation dose during a flight HERE. For nearly three decades, 52-year-old Sara Nelson has been exposed to radiation every time she goes to work — a risk shared by hundreds of ...

NASA launched four astronauts on a historic nine-day trip around the moon and back. Here's everything to know about the ...

Frequent flyers and airline crews face a higher risk of radiation exposure from the sun. The risk is greatest on flights at high altitudes, over the poles or during solar events. Radiation exposure ...